Carbon fiber reinforced polyamide composite material and preparation method thereof
A composite material and carbon fiber technology, applied in the field of polymers, can solve the problems of low utilization rate, achieve the effect of improving surface polarity, improving adhesion, and simple production process
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[0025] The invention provides a carbon fiber-reinforced polyamide composite material and a preparation method thereof. In the invention, the carbon fiber is subjected to surface treatment, which specifically includes: wherein the carbon fiber surface treatment agent is prepared from the following components according to mass percentage: solvent 0-99% ; Polyacrylonitrile 1-100%.
[0026] The solvent is a polar solvent, including one or more of water, ethanol, methanol, and acetone. The carbon fibers are polyacrylonitrile-based carbon fibers. The polyacrylonitrile is a liquid polyacrylonitrile oligomer with a molecular weight range of 106-10000.
[0027] Carbon fiber surface treatment method, the specific steps include:
[0028] Step 1: mix polyacrylonitrile and solvent according to the mass percentage and stir evenly to form a carbon fiber surface treatment agent;
[0029] Step 2: soaking the carbon fiber with the carbon fiber surface treatment agent in step 1;
[0030] Ste...
Embodiment 1
[0033] The preparation method of the composite material is as follows: the mass ratio of the polyamide resin is: 69.6%; the mass ratio of the lubricant (zinc stearate) is: 0.2%; 5'-di-tert-butyl-4'-hydroxyphenyl) propionate] pentaerythritol ester) mass ratio: 0.2%. Mix for 4 minutes in a high-speed mixer;
[0034] The uniformly mixed components are placed in a twin-screw extruder, melted, mixed, extruded and granulated, and 30% of the carbon fiber is fed into the extruder by side feeding;
[0035] The processing temperature is zone 1 temperature: 240-250℃, zone 2 temperature: 245-260℃, zone 3 temperature: 245-260℃, zone 4 temperature: 250-270℃, zone 5 temperature: 250-280℃, zone 6 Zone temperature: 250-275°C, zone seven temperature: 250-260°C, host speed: 300-350rpm.
[0036] The particles completed by the above method are dried in a blast oven at 90-110°C for 4 hours in advance, and then the dried particle materials are injection-molded on the injection machine to prepare s...
Embodiment 2
[0038] The preparation method of the composite material is as follows: the mass ratio of the polyamide resin is: 59.6%; the mass ratio of the lubricant (zinc stearate) is: 0.1%; 5'-di-tert-butyl-4'-hydroxyphenyl) propionate] pentaerythritol ester) mass ratio: 0.3%. Mix for 4 minutes in a high-speed mixer;
[0039] The uniformly mixed components are placed in a twin-screw extruder, melted, mixed, extruded and granulated, and 40% of the carbon fiber is fed into the extruder by side feeding;
[0040] The processing temperature is zone 1 temperature: 240-250℃, zone 2 temperature: 245-260℃, zone 3 temperature: 245-260℃, zone 4 temperature: 250-270℃, zone 5 temperature: 250-280℃, zone 6 Zone temperature: 250-275°C, zone seven temperature: 250-260°C, host speed: 300-350rpm.
[0041] The particles completed by the above method are dried in a blast oven at 90-110°C for 4 hours in advance, and then the dried particle materials are injection-molded on the injection machine to prepare s...
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